Fabrication methods of metal/polymer/ceramic matrix composites containing randomly distributed or directionally aligned nanofibers

a technology of randomly distributed or directionally aligned nanofibers, which is applied in the field of manufacturing a composite having nanofibers, can solve the problems of deterioration of mechanical and electrical properties of the composite, failure to achieve remarkably enhanced properties, and degradation of the mechanical properties of the matrix, so as to improve manufacturing efficiency, widen industrial applications of nanofibers, and simplify manufacturing processes

Active Publication Date: 2011-12-13
APPLIED CARBON NONO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach achieves uniform dispersion and directionality of nanofibers, enhancing mechanical and electrical properties, and simplifying the manufacturing process, thereby improving efficiency and expanding industrial applications for high-strength, high-toughness materials.

Problems solved by technology

However, in this conventional method, carbon nanotubes are not uniformly dispersed in the aluminum matrix and aggregate at grain boundaries, causing deterioration in sintering capability when producing the composite, and deterioration in mechanical and electrical properties of the composite, which leads to a failure of achieving remarkably enhanced properties.
In other words, when the composite is formed, the carbon nanotubes agglomerate on the surface of the powdered metal matrix due to insufficient dispersion of the carbon nanotubes, so that the surface of the metal matrix having agglomeration of the carbon nanotubes acts as a defect, thereby deteriorating the mechanical properties of the matrix while making it difficult to achieve enhanced mechanical properties by addition of the carbon nanotubes.
However, this method requires controlling of various process factors such as kinds of dispersive solvent, amount of solvent according to a fraction, calcination temperature, reduction conditions, etc., and must be performed for several processes requiring a great deal of time.
Thus, this method has problems in that it is difficult to manufacture a reproducible composite, and in that industrial efficiency is reduced.

Method used

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  • Fabrication methods of metal/polymer/ceramic matrix composites containing randomly distributed or directionally aligned nanofibers
  • Fabrication methods of metal/polymer/ceramic matrix composites containing randomly distributed or directionally aligned nanofibers
  • Fabrication methods of metal/polymer/ceramic matrix composites containing randomly distributed or directionally aligned nanofibers

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examples

[0036]Table 1 shows kinds of matrix, fractions of carbon nanotubes, mechanical processing methods, results of uniform dispersion, and mechanical mass flowing processes, which were applied to manufacture of the following examples.

[0037]

TABLE 1CNTMillingAnisotropyContentMillingSpeedCNTMethod forofSample No.Matrix(Vol. %)Time (H)(RPM)DispersionanisotropyCNTComposite 1Al1>1>300◯Hot extrusion◯3◯Hot rolling◯5◯Hot extrusion◯Composite 2Cu1>1>300◯Hot extrusion◯3◯Hot extrusion◯5◯Hot rolling◯Composite 3Ni1>1>300◯Hot extrusion◯3◯Hot rolling◯5◯Hot extrusion◯Composite 4Fe1>1>300◯Hot rolling◯3◯Hot extrusion◯5◯Hot extrusion◯Composite 5Brass1>1>300◯Hot rolling◯3◯Hot extrusion◯5◯Hot extrusion◯Composite 6PMMA1>1>300◯Hot rolling◯3◯Hot extrusion◯5◯Hot rolling◯Composite 7PVC1>1>300◯Hot extrusion◯3◯Hot rolling◯5◯Hot extrusion◯Composite 8PE1>1>300◯Hot rolling◯3◯Hot extrusion◯5◯Hot rolling◯Composite 9Al2O31>1>300◯Hot sintering◯3◯Hot sintering◯5◯Hot sintering◯CompositeMgO1>1>300◯Hot sintering◯103◯Hot sinteri...

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Abstract

Disclosed herein is a method for manufacturing a composite having nanofibers uniformly dispersed in a metal, polymer or ceramic matrix. The method comprises mixing the nanofibers with a metallic, polymeric or ceramic material, followed by uniformly dispersing the nanofibers in the material via deformation of the metal, polymer or ceramic matrix by application of mechanical energy to the material; and imparting a directionality to the nanofibers via application of a mechanical mass flowing process to a composite material with the nanofibers uniformly dispersed in the metal, polymer or ceramic matrix. With the method, since the nanofibers can be uniformly dispersed in the metal, polymer or ceramic matrix via a simple mechanical process, the composite can be manufactured through a simple process, thereby enhancing manufacturing efficiency.

Description

TECHNICAL FIELD[0001]The present invention relates to a method for manufacturing a composite having nanofibers uniformly dispersed in a metal, polymer or ceramic matrix. More particularly, the present invention relates to a method for manufacturing a composite which comprises nanofibers uniformly dispersed in a metal, polymer or ceramic matrix via elastic deformation or plastic deformation of the matrix by application of a mechanical impact to the metal, polymer or ceramic matrix and the nanofibers so that the nanofibers have a predetermined direction in the composite via mechanical mass flow of powdered metal, polymer or ceramic matrix having the nanofibers dispersed therein.BACKGROUND ART[0002]Investigations regarding mixing and dispersing nanofibers with a metal, polymer or ceramic matrix have been progressing for several years. In particular, C. L. Xu, B. Q. Wei, R. Z. Ma, J. Liang, X. K. Ma, D. H. Wu in “Carbon,” Vol. 37, 1999, pp 855-858, and J. W. Ning, J. J Zhang, Y. B. Pan ...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): B29C47/00
CPCB82Y30/00C04B26/02C08J5/005C08J5/042C08K7/06C22C47/14C04B14/026C04B40/0028C08L21/00C22C49/06C22C49/11C22C49/08B22F9/04B22F3/18B22F3/20C22C47/025B22F2998/00B22F2998/10B22F2999/00C22C2026/002Y10S977/742B01J19/32
InventorBAE, DONG-HYUNLEE, SUNG-WOONLEE, DAE-YEOLMOON, SEOK-MINBAE, SANG-JUN
OwnerAPPLIED CARBON NONO TECH